In-cell touch screen and display device

ABSTRACT

In an in-cell touch panel and a display device, the common electrode layer in the array substrate is partitioned into a plurality of sub-electrodes arranged in an array, spaced sub-electrodes in each column of sub-electrodes serve as touch driving sub-electrodes (a) constituting a touch driving electrode and sub-electrodes other than them serve as common sub-electrodes (b). During line-by-line scanning of gate lines covered by a row of sub-electrodes, the row of sub-electrodes are applied with common electrode signals, touch driving sub-electrodes in other rows of sub-electrodes are applied with touch driving signals, and common sub-electrodes in other rows of sub-electrodes are applied with common electrode signals. The in-cell touch panel can avoid various display and touch problems resulted from deficiency of time caused by time-division driving.

The application is a U.S. National Phase Entry of InternationalApplication No. PCT/CN2015/073009 filed on Feb. 13, 2015, designatingthe United States of America and claiming priority to Chinese PatentApplication No. 201410638383.5 filed on Nov. 6, 2014. The presentapplication claims priority to and the benefit of the above-identifiedapplications and the above-identified applications are incorporated byreference herein in their entirety.

TECHNICAL FIELD

Embodiments of the present invention relate to an in-cell touch screenand a display device.

BACKGROUND

Generally, in-cell touch panels utilize mutual capacitance principle todetect touch position of a finger. A pattern of touch electrodes isgenerally embedded within the touch panel. In order to avoid mutualinterference between touch signals applied by touch electrodes andnormal display signals in the touch screen, the touch function and thedisplay function are typically driven in a time-division manner. Asillustrated in FIG. 1, a frame period (Vsync) is divided into a touchinterval (Touch) and a display interval (Display). Data signals and gatelines Gn-2, Gn-1, Gn, G3, G2 and G1 only work in the display interval,and touch signals only work in the touch interval. Thus, durationsassigned for the touch interval and the display interval in each frameare relatively short, and deficiency of time caused by the time-divisiondriving may result in various display and touch problems.

SUMMARY

Embodiments of the present invention provide an in-cell touch panel anda display device to address the display and touch problems resulted fromdeficiency of time caused by driving the touch and display functions ina time-division manner for in-cell touch panels.

At least one embodiment of the present invention provides an in-celltouch panel including: an array substrate including gate lines and acommon electrode layer, and an opposing substrate disposed oppositely tothe array substrate, the common electrode layer of the array substrateincluding a plurality of sub-electrodes arranged in an array; spacedsub-electrodes in each column of the sub-electrodes serve as touchdriving sub-electrodes constituting a touch driving electrode andsub-electrodes other than touch driving sub-electrodes serve as commonsub-electrodes; upon line-by-line scanning of the gate lines covered byeach row of sub-electrodes, sub-electrodes in the row are used to applycommon electrode signals, touch driving sub-electrodes in rows otherthan the row of sub-electrodes are used to apply touch driving signals,and common sub-electrodes in rows other than the row of sub-electrodesare used to apply common electrode signals.

For example, the opposing substrate comprises a plurality of touchsensing electrodes disposed to intersect the touch driving electrodes,and orthogonal projections of the touch sensing electrodes on the arraysubstrate are located in an area where the common sub-electrodes arelocated.

For example, in a non-display area the array substrate is provided with:touch signal lines in one-to-one correspondence with the touch drivingelectrodes, display control lines and touch control lines in one-to-onecorrespondence with sub-electrode rows comprising touch drivingsub-electrodes, and common electrode signal lines.

For example, in each row of sub-electrodes, touch driving sub-electrodesare connected with touch signal lines corresponding to touch drivingelectrodes, to which they belong, via touch switching devices, andcontrol ends of the touch switching devices are connected with a touchcontrol line corresponding to the row of sub-electrodes; the touchswitching devices are configured to conduct between touch signal linesand touch driving sub-electrodes when the gate lines covered by rows ofsub-electrodes other than the row of sub-electrodes are scanned line byline; in each row of sub-electrodes, the touch driving sub-electrodesare connected with the common electrode signal line via displayswitching devices, and control ends of the display switching devices areconnected with display control line corresponding to the row ofsub-electrodes; the display switching devices are configured to conductbetween the common electrode signal lines and the touch drivingsub-electrodes when the gate lines covered by the row of sub-electrodesare scanned line by line.

For example, each of the touch switching devices comprises: a firstswitching transistor with a gate electrode connected with one of thetouch control lines, a drain electrode connected with one of the touchdriving sub-electrodes, and a source electrode connected with one of thetouch signal line.

For example, the first switching transistor and the second switchingtransistor are both N-type transistors or P-type transistors and thedisplay control line and touch control line corresponding to a same rowof sub-electrodes are configured to apply control signals with oppositepolarity at the same time; or the first switching transistor and thesecond switching transistor are an N-type transistor and a P-typetransistor respectively and the display control line and touch controlline corresponding to a same row of sub-electrodes are configured toapply control signals with a same polarity at the same time.

For example, a display control line corresponding to a row ofsub-electrodes is connected with a gate line covered by the row ofsub-electrodes via a turning-on switching device, and is connected witha last-scanned gate line covered by the row of sub-electrodes via aturning-off switching device, and a control end of the turning-offswitching device is connected with the touch control line correspondingto the row of sub-electrodes; and the turning-on switching device andthe turning-off switching device are configured to let the displaycontrol line have control signals with opposite polarities when the gateline covered by the row of sub-electrodes is scanned and when thescanning is completed.

For example, the turning-on switching device is a third switchingtransistor with a gate electrode and a source electrode connected with acorresponding gate line, and a drain electrode connected with thedisplay control line; and the turning-off switching device is a fourthswitching transistor with a gate electrode connected with the touchcontrol line, a source electrode connected with a corresponding gateline, and a drain electrode connected with a display control line.

For example, in the plurality of sub-electrodes arranged in an arrayresulted from partition of the common electrode layer, and touch drivingsub-electrodes and common sub-electrodes are arranged alternatively inboth row and column directions of a matrix.

For example, in the plurality of sub-electrodes arranged in an arrayresulted from partition of the common electrode layer, touch drivingsub-electrodes and common sub-electrodes are arranged in entire row in amatrix.

An embodiment of the present invention provides a display deviceincluding any of the above-mentioned in-cell touch panel provided in anyone of the embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to clearly illustrate the technical solution of the embodimentsof the invention, the drawings of the embodiments will be brieflydescribed in the following; it is obvious that the described drawingsare only related to some embodiments of the invention and thus are notlimitative of the invention.

FIG. 1 is a timing diagram for an in-cell touch panel;

FIG. 2 is a longitudinal sectional diagram of an in-cell touch panelprovided in an embodiment of the present invention;

FIGS. 3a and 3b are top views of an in-cell touch panel provided in anembodiment of the present invention respectively;

FIG. 4a is a schematic diagram of an array substrate in the in-celltouch panel provided in an embodiment of the present invention; and

FIG. 4b is a timing diagram for operation in FIG. 4 a.

REFERENCE NUMERALS

110—gate line; 120—common electrode layer; 100—array substrate;200—opposing substrate; 121—touch driving electrode; 210—touch sensingelectrode; a—touch driving sub-electrode; b—common sub-electrode.

DETAILED DESCRIPTION OF EMBODIMENTS

In order to understand the above-mentioned objects, features andadvantages of the present invention more clearly, specificimplementations of the in-cell touch panel and display device providedin embodiments of the present invention will be described in detailbelow with reference to accompanying drawings. Apparently, the describedembodiments are just a part but not all of the embodiments of theinvention. Based on the described embodiments herein, those skilled inthe art can obtain other embodiment(s), without any inventive work,which should be within the scope of the invention.

Unless otherwise defined, all the technical and scientific terms usedherein have the same meanings as commonly understood by one of ordinaryskill in the art to which the present invention belongs. Terms such as“first”, “second” and the like used in the present disclosure do notindicate any sequence, quantity or significance but only fordistinguishing different constituent parts. Thicknesses and shapes oflayers in the accompanying drawings do not reflect real scale, and onlyserve to illustrate contents of the embodiments of the presentinvention.

FIG. 2 is a longitudinal sectional diagram of an in-cell touch panelprovided in an embodiment of the present invention. An embodiment of thepresent invention provides an in-cell touch panel as illustrated in FIG.2, comprising: an array substrate 100 comprising gate lines 110 and acommon electrode layer 120, and an opposing substrate 200 disposedoppositely to the array substrate 100. For example, the common electrodelayer 120 is disposed over gate lines 110. For example, the opposingsubstrate 200 is a color filter substrate including color filter unitscorresponding to sub-pixels units on the array substrate 100 and a blackmatrix and so on.

As illustrated in FIG. 3a and FIG. 3b , the common electrode layer 120of the array substrate 100 includes a plurality of sub-electrodesarranged in an array. In each column of sub-electrodes, sub-electrodesthat are provided spaced from each other serve as touch drivingsub-electrodes a, and these sub-electrodes constitute a touch drivingelectrode 121 (as illustrated with shadowed blocks in FIGS. 3a and 3b ),and sub-electrodes other than touch driving sub-electrodes a serve ascommon sub-electrodes b.

The opposing substrate 200 has a plurality of touch sensing electrodes210 disposed to intersect touch driving electrodes 121. Orthogonalprojections of the touch sensing electrodes 210 on the array substrate100 are located in the area where common sub-electrodes b are located.For example, as illustrated in FIG. 3a , all the touch drivingelectrodes 121 disposed on the array substrate 100 extend in thelongitudinal direction, while all the touch sensing electrodes 210disposed on the opposing substrate 200 extend in the transversedirection. Arrangement of the touch sensing electrodes in this way canprovide mutual capacitance of appropriate range between the touchsensing electrodes and the touch driving electrodes while avoid largemutual capacitance between them. This is in favor of detection of touchposition comparatively.

Upon line-by-line scanning the gate lines that are covered by(corresponding to) each row of sub-electrodes, sub-electrodes in therespective row are employed to apply common electrode signals (Vcom),the touch driving sub-electrodes in the rows other than the present rowof sub-electrodes are employed to apply touch driving signals (Touch),and common sub-electrodes in the rows other than the present row ofsub-electrodes are employed to apply common electrode signals (Vcom).That is, while one row of sub-electrodes operates for conductingdisplaying, the other rows of touch driving sub-electrodes operate forconducting touch driving.

By adopting the above-mentioned driving manner for the in-cell touchpanel provided in the embodiment of the present invention, it ispossible to realize a display operation and a touch operation that areconducted simultaneously, ensuring that display and touch problemsresulted from deficiency of time due to time-division driving will notoccur in the case of high resolution display.

For example, in the above-mentioned in-cell touch panel provided in theembodiment of the present invention, the common electrode layer of thearray substrate is partitioned into a plurality of sub-electrodesarranged in an array which may be divided into touch drivingsub-electrodes and common sub-electrodes in the following two methods.

As the first method, as illustrated in FIG. 3a , touch drivingsub-electrodes a and common sub-electrodes b are both aligned in wholerows, that is, one row of touch driving sub-electrodes a and one row ofcommon sub-electrodes b are arranged alternatively. FIG. 3a shows eight(8) touch driving electrodes Tx1, . . . Tx8, each of which consists ofeight (8) touch driving sub-electrodes a, while eight (8) electrodesRx1, . . . Rx8 are also provided for touch sensing and disposed tointersect the touch driving electrodes 121.

As the second method, as illustrated in FIG. 3b , touch drivingsub-electrodes a and common sub-electrodes b are arranged alternativelyin both row direction and column direction of the matrix. FIG. 3b showseight (8) touch driving electrodes Tx1, . . . Tx8, each of whichconsists of eight (8) touch driving sub-electrodes a respectively.

The array substrate in the first method will be described below toexplain in detail how the above-mentioned in-cell touch panel providedin the embodiment of the present invention simultaneously implement thedisplay and touch driving operations.

Considering an array substrate with a common electrode layer containing3*3 sub-electrodes as an example, as illustrated in FIG. 4a , both thefirst and third rows of sub-electrodes serve as touch drivingsub-electrodes, the second row of sub-electrodes serve as commonsub-electrodes, the touch driving sub-electrodes are divided into 3touch driving electrodes Tx1, Tx2 and Tx3 extending in longitudinaldirection, and each touch driving electrode consists of two subsections,i.e., subsection 1 and subsection 2 of the touch driving sub-electrode,respectively.

Generally, the touch resolution of a touch panel is typically on theorder of millimeters. Therefore, upon specific implementation, it ispossible to select the densities and occupied areas of touch drivingsub-electrodes according to the required touch resolution. Generally,touch driving sub-electrodes are designed as square electrodes of 5 mm*5mm or so. While the display resolution of a display screen is generallyon the order of microns. Therefore, a single touch driving sub-electrodegenerally corresponds to a plurality of pixel units in the displayscreen. That is, a touch driving sub-electrode will cover a plurality ofgate lines. In FIG. 4a , one row of sub-electrodes covering three (3)gate lines will be described as an example, in which the first row ofsub-electrodes cover gate lines Gate n+1, Gate n+2 and Gate n+3 (namelythe (n+1)th to (n+3)th gate lines), the second row of sub-electrodescover gate lines Gate n+4, Gate n+5 and Gate n+6 (namely the (n+4)th to(n+6)th gate lines), and the third row of sub-electrodes cover gatelines Gate n+7, Gate n+8 and Gate n+9 (namely the (n+7)th to (n+9)thgate lines).

In the display interval (Display) of a frame, gate driving circuits(GOAs) connected with the gate lines will scan gate lines line by line.As illustrated in FIG. 4b , while scanning from the gate line Gate n+1to the gate line Gate n+3, the Tx1 subsection 1, Tx2 subsection 1, andTx3 subsection 1 of the first row of sub-electrodes serve as commonsub-electrodes to apply common electrode signals (Vcom), and Tx1subsection 2, Tx2 subsection 2, and Tx3 subsection 2 of the touchdriving sub-electrodes in the third row of sub-electrodes conduct touchscanning to apply touch driving signals (Touch). Similarly, whilescanning from the gate line Gate n+4 to the gate line Gate n+6, thesecond row of sub-electrodes serve as common sub-electrodes to applycommon electrode signals (Vcom), and Tx1 subsection 1, Tx2 subsection 1,and Tx3 subsection 1 of the touch driving sub-electrodes in the firstrow of sub-electrodes, and Tx1 subsection 2, Tx2 subsection 2, and Tx3subsection 2 of the touch driving sub-electrodes in the third row ofsub-electrodes conduct touch scanning to apply touch driving signals(Touch). While scanning from the gate line Gate n+7 to the gate lineGate n+9, TX1 subsection 2, Tx2 subsection 2, and Tx3 subsection 2 ofthe touch driving sub-electrodes in the third row of sub-electrodesserve as common sub-electrodes to apply common electrode signals (Vcom),and Tx1 subsection 1, Tx2 subsection 1, and Tx3 subsection 1 of thetouch driving sub-electrodes in the first row of sub-electrodes conducttouch scanning to apply touch driving signals (Touch). This kind ofoperation ensures that, in the period of a frame, three rows ofsub-electrodes in the entire panel are scanned once according to displaydriving, and each row of sub-electrodes are scanned twice respectivelyaccording to touch driving. In this way, it is possible to realize thatthe scanning frequency of touch driving is 2 times more than thescanning frequency of display driving. For example, 60 Hz scanning isconducted for display driving, and 120 Hz scanning may be conducted fortouch driving, which can satisfy normal touch driving requirement (80Hz-120 Hz).

The array substrate having a common electrode layer containing 3*3sub-electrodes as illustrated in FIG. 4a will be described as an exampleto explain how the above-mentioned in-cell touch panel provided in theembodiment of the present invention control the same touch drivingsub-electrode to apply different electrical signals in different timeintervals.

As illustrated in FIG. 4a , the array substrate 100 is generallyprovided in the non-display area with touch signal lines T1, T2 and T3in one-to-one correspondence with the touch driving electrodes Tx1, Tx2and Tx3, display control lines S1, S2 and touch control lines A1, A2 inone-to-one correspondence with the sub-electrode rows having touchdriving sub-electrodes (namely the first row and the third row), and acommon electrode signal line V. In order to facilitate applyingcorresponding electrical signals, these lines generally extend inlongitudinal direction in the non-display area of the array substrate.

In the each row of sub-electrodes, touch driving sub-electrodes areconnected with touch signal lines corresponding to the touch drivingelectrodes, to which they belong, via touch switching devices, andcontrol ends of the touch switching devices are connected with a touchcontrol line corresponding to the row of sub-electrodes. For example,the subsection 1 of touch driving sub-electrode Tx1 in the first row isconnected with the touch signal line T1 via a touch switching device M1a, and the control end of the touch switching device M1 a is connectedwith the line A1. The touch switching device M1 a is configured toconduct between the touch signal line T1 and the subsection 1 of touchdriving sub-electrode Tx1 when the gate lines (Gate n+4 to Gate n+9)covered by rows of sub-electrodes (the second and third rows) other thanthe present row of sub-electrodes (first row) are scanned line by line,such that the subsection 1 of the touch driving sub-electrode Tx1 isapplied with touch scanning signals.

In each row of sub-electrodes, each touch driving sub-electrode isconnected with the common electrode signal line via a display switchingdevice, and the control end of the display switching device is connectedwith the display control line corresponding to the row ofsub-electrodes. For example, the subsection 1 of the touch drivingsub-electrode Tx1 in the first row is connected with the commonelectrode signal line V via a display switching device N1 a, and thecontrol end of the display switching device N1 a is connected with thedisplay control line S1. The display switching device N1 a is configuredto conduct between the common electrode signal line V and the subsection1 of touch driving sub-electrode Tx1 when the gate lines Gate n+1 toGate n+3 covered by the row of sub-electrodes (the first row) arescanned line by line such that the subsection 1 of the touch drivingsub-electrode Tx1 is applied with common electrode signals, and therebycan cooperate with pixel electrodes of sub-pixels in the respective rowto implement the display operation.

The above describes only the subsection 1 of the touch drivingsub-electrode Tx1 as an example, and the operation principle of othertouch driving sub-electrodes is similar and will not be repeated indetail.

For example, as illustrated in FIG. 4a , the above-mentioned touchswitching device M1 a may include: a first switching transistor having agate electrode connected with the touch control line A1, a drainelectrode connected with the subsection 1 of the touch drivingsub-electrode Tx1, and a source electrode connected with the touchsignal line T1. The above-mentioned display switching device N1 a mayinclude: a second switching transistor having a gate electrode connectedwith the display control line S1, a drain electrode connected with thesubsection 1 of the touch driving sub-electrode Tx1, and a sourceelectrode connected with the common electrode signal line V.

For example, in the case where switching transistors are used as touchswitching devices and display switching devices, electrical signalsapplied over the touch control lines and the display control lines serveas control signals for turning on and off the switching transistorsrespectively. Therefore, it is possible to set corresponding controlsignals according to the type of switching transistors. For example, ifboth the first and second switching transistors are N-type transistorsor P-type transistors, the display control line and the touch controlline corresponding to the same row of sub-electrodes are configured toapply control signals with opposite polarities at the same time, asillustrated by the control signals applied by the lines A1 and S1, A2and S2 in FIG. 4b , so as to ensure that only one of the first andsecond switching transistors is turned on. If the first and secondswitching transistors are N-type transistor and P-type transistorrespectively, the display control line and the touch control linecorresponding to the same row of sub-electrodes are configured to applycontrol signals with the same polarity at the same time to ensure thatone of the first and second switching transistors is selected to beturned on.

Furthermore, because there are many wires disposed in the non-displayarea of the array substrate, if each wire is provided with an inputsignal separately, a large space will be occupied. Therefore, in orderto reduce the space occupied by the wires, for example, it is possibleto control the signals applied over the display control lines S1 and S2with the signals applied over other wires. As illustrated in FIG. 4a , adisplay control line corresponding to a row of sub-electrodes may beconnected with the gate lines covered by the row of sub-electrodes via aturning-on switching device, and connected with the last-scanned gateline covered by the row of sub-electrodes via a turning-off switchingdevice, and the control end of the turning-off switching device isconnected with the touch control line corresponding to the row ofsub-electrodes. For example, the display control line S1 correspondingto the first row of sub-electrodes is connected with gate lines Gate n+1to Gate n+3 respectively through three turning-on switching devices O1a, and connected with the last-scanned gate line Gate n+3 covered by therow of sub-electrode via a turning-off switching device P1. The controlend of the turning-off switching device P1 is connected with the touchcontrol line A1 corresponding to the row of sub-electrodes. Theturning-on switching device O1 a and the turning-off switching device P1are configured to let the display control line have control signals withopposite polarities when the gate lines covered by the row ofsub-electrodes are scanned and when the scanning is completed. That is,when the gate lines Gate n+1 to Gate n+3 are scanned, the signal appliedon the display control line S1 and the signal applied on gate lines areidentical, e.g., a high level signal, and when scanning of the gate lineGate n+3 is completed, become a low level signal, that is, then thesignal applied on the display control line S1 is pulled down to be a lowlevel signal.

As illustrated in FIG. 4a , the above-mentioned turning-on switchingdevice O1 a is a third switching transistor having both a gate electrodeand a source electrode connected with the corresponding gate line Gaten+1, and a drain electrode connected with the display control line S1.The above-mentioned turning-off switching device P1 is a fourthswitching transistor having a gate electrode connected with the touchcontrol line A1, a source electrode connected with the gate line Gaten+3, and a drain electrode connected with the display control line S1.

An embodiment of the present invention further provides a display deviceincluding any of the above-mentioned in-cell touch panels provided inany embodiment of the present invention, which may be any product orcomponent with display function such as a cell phone, a watch, a slabcomputer, a TV set, a display, a notebook computer, a digital pictureframe or a navigator. The above-mentioned embodiments of the in-celltouch panel may be referred to for implementations of the displaydevice, and repeated description will not be conducted any more.

In the in-cell touch panel and display device provided in embodiments ofthe present invention, the common electrode layer connected in theentire surface of the array substrate is partitioned into a plurality ofsub-electrodes arranged in an array, spaced sub-electrodes in eachcolumn of sub-electrodes serve as touch driving sub-electrodes thatconstitute a touch driving electrode, sub-electrodes other than touchdriving sub-electrodes serve as common sub-electrodes; a plurality oftouch sensing electrodes are provided on the opposing substrate anddisposed to intersect touch driving electrodes, and projections of touchsensing electrodes on the array substrate are located within the areawhere common sub-electrodes are located. For example, the followingdriving method may be adopted, in which upon line-by-line scanning ofthe gate lines covered by each row of sub-electrodes, sub-electrodes inthe row are used to apply common electrode signals, touch drivingsub-electrodes in rows other than the present row of sub-electrodes areused to apply touch driving signals, and common sub-electrodes in rowsother than the present row of sub-electrodes are used to apply commonelectrode signals. That is, when one row of sub-electrodes are operatingfor displaying, other rows of touch driving sub-electrodes are operatingfor touch driving. With the above-mentioned driving manner, it ispossible to realize simultaneous display and touch operations andguarantee that various display and touch problems resulted fromdeficiency of time caused by time-division driving will not occur uponhigh resolution display.

It is understood that one skilled in the art can make variousmodifications and variations to the present invention without departingfrom the spirit and scope of the present invention. Thus, if thesemodifications and variations of the present invention fall within thescope of claims and their equivalents of the present invention, it isintended that the present invention contains these modifications andvariations.

The present application claims priority of China Patent application No.201410638383.5 filed on Nov. 6, 2014, the content of which isincorporated in its entirety as part of the present application byreference herein.

The invention claimed is:
 1. An in-cell touch panel comprising: an arraysubstrate comprising gate lines and a common electrode layer, and anopposing substrate disposed oppositely to the array substrate, wherein:the common electrode layer of the array substrate comprises a pluralityof sub-electrodes arranged in an array; spaced sub-electrodes in eachcolumn of the sub-electrodes serve as touch driving sub-electrodesconstituting a touch driving electrode, and sub-electrodes other thanthe touch driving sub-electrodes serve as common sub-electrodes; duringline-by-line scanning of the gate lines covered by each row ofsub-electrodes, sub-electrodes in the row are used to be applied withcommon electrode signals for conducting a displaying function, touchdriving sub-electrodes in rows other than the row of sub-electrodes areused to be applied with touch driving signals for conducting a touchdriving function, and common sub-electrodes in rows other than the rowof sub-electrodes are used to be applied with common electrode signals;in a non-display area the array substrate is provided with displaycontrol lines and touch control lines in one-to-one correspondence withsub-electrode rows comprising touch driving sub-electrodes; each displaycontrol line corresponding to a corresponding row of sub-electrodes isconnected with a gate line covered by the row of sub-electrodes via aturning-on switching device, and is connected with a last-scanned gateline covered by the row of sub-electrodes via a turning-off switchingdevice, and a control end of the turning-off switching device isconnected with a touch control line corresponding to the row ofsub-electrodes; and the turning-on switching device and the turning-offswitching device are configured to let the display control line havecontrol signals with opposite polarities when the gate line covered bythe row of sub-electrodes is scanned and when the scanning is completed.2. The in-cell touch panel of claim 1, wherein, the opposing substratecomprises a plurality of touch sensing electrodes that are disposed tointersect the touch driving electrodes, and orthogonal projections ofthe touch sensing electrodes on the array substrate are located in anarea where the common sub-electrodes are located.
 3. The in-cell touchpanel of claim 1, wherein, in the non-display area, the array substrateis also provided with: touch signal lines in a one-to-one correspondencewith the touch driving electrodes, and common electrode signal lines. 4.The in-cell touch panel of claim 3, wherein, in each row ofsub-electrodes, touch driving sub-electrodes are connected with touchsignal lines corresponding to touch driving electrodes, to which theybelong, via touch switching devices, and control ends of the touchswitching devices are connected with a touch control line correspondingto the row of sub-electrodes; the touch switching devices are configuredto conduct between touch signal lines and touch driving sub-electrodeswhen the gate lines covered by rows of sub-electrodes other than the rowof sub-electrodes are scanned line by line; and in each row ofsub-electrodes, the touch driving sub-electrodes are connected with thecommon electrode signal line via display switching devices, and controlends of the display switching devices are connected with display controlline corresponding to the row of sub-electrodes; the display switchingdevices are configured to conduct between the common electrode signallines and the touch driving sub-electrodes when the gate lines coveredby the row of sub-electrodes are scanned line by line.
 5. The in-celltouch panel of claim 4, wherein, each of the touch switching devicescomprises: a first switching transistor with a gate electrode connectedwith one of the touch control lines, a drain electrode connected withone of the touch driving sub-electrodes, and a source electrodeconnected with one of the touch signal lines.
 6. The in-cell touch panelof claim 5, wherein, each of the display switching devices comprises: asecond switching transistor with a gate electrode connected with one ofthe display control lines, a drain electrode connected with one of thetouch driving sub-electrodes, and a source electrode connected with thecommon electrode signal line.
 7. The in-cell touch panel of claim 6,wherein, the first switching transistor and the second switchingtransistor are both N-type transistors or P-type transistors and thedisplay control line and the touch control line corresponding to a samerow of sub-electrodes are configured to apply control signals withopposite polarities at the same time; or the first switching transistorand the second switching transistor are an N-type transistor and aP-type transistor respectively and the display control line and thetouch control line corresponding to a same row of sub-electrodes areconfigured to apply control signals with a same polarity at the sametime.
 8. The in-cell touch panel of claim 1, wherein, the turning-onswitching device is a third switching transistor with a gate electrodeand a source electrode connected with a corresponding gate line, and adrain electrode connected with the display control line; and theturning-off switching device is a fourth switching transistor with agate electrode connected with the touch control line, a source electrodeconnected with a corresponding gate line, and a drain electrodeconnected with the display control line.
 9. The in-cell touch panel ofclaim 1, wherein the plurality of sub-electrodes arranged in an array isresulted from a partitioning of the common electrode layer, and thetouch driving sub-electrodes and the common sub-electrodes are arrangedalternatively in both row and column directions of a matrix.
 10. Thein-cell touch panel of claim 1, wherein the plurality of sub-electrodesarranged in an array is resulted from a partitioning of the commonelectrode layer, and the touch driving sub-electrodes and the commonsub-electrodes are arranged in corresponding rows of a matrix.
 11. Adisplay device, comprising the in-cell touch panel of claim
 1. 12. Thein-cell touch panel of claim 2, wherein the plurality of sub-electrodesarranged in an array is resulted from a partitioning of the commonelectrode layer, and the touch driving sub-electrodes and the commonsub-electrodes are arranged alternatively in both row and columndirections of a matrix.
 13. The in-cell touch panel of claim 2, whereinthe plurality of sub-electrodes arranged in an array is resulted from apartitioning of the common electrode layer, and the touch drivingsub-electrodes and the common sub-electrodes are arranged incorresponding rows of a matrix.
 14. The in-cell touch panel of claim 3,wherein the plurality of sub-electrodes arranged in an array is resultedfrom a partitioning of the common electrode layer, and the touch drivingsub-electrodes and the common sub-electrodes are arranged alternativelyin both row and column directions of a matrix.
 15. The in-cell touchpanel of claim 3, wherein the plurality of sub-electrodes arranged in anarray is resulted from a partitioning of the common electrode layer, andthe touch driving sub-electrodes and the common sub-electrodes arearranged in corresponding rows of a matrix.
 16. The in-cell touch panelof claim 4, wherein the plurality of sub-electrodes arranged in an arrayis resulted from a partitioning of the common electrode layer, and thetouch driving sub-electrodes and the common sub-electrodes are arrangedalternatively in both row and column directions of a matrix.
 17. Thein-cell touch panel of claim 4, wherein the plurality of sub-electrodesarranged in an array is resulted from a partitioning of the commonelectrode layer, and the touch driving sub-electrodes and the commonsub-electrodes are arranged in corresponding rows of a matrix.